UAV Camera Focusing Interval Control to Reduce Motor Wear
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) frequently adjust their focus, leading to accelerated wear and tear, as they often refocus even when the image sharpness remains unchanged, especially during high-altitude aerial photography.
Innovation Solution
A focusing method for UAVs that involves acquiring a far focus and a preset focus interval, determining whether to refocus based on sharpness statistical values, reducing unnecessary focusing by ensuring the image site falls within the focus interval, thereby extending the service life of UAV components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequent focusing operations are performed to maintain image clarity during high-altitude aerial photography, then image quality is improved, but the service life of UAV elements is reduced
Solution Approach 1:
The patent changes the focusing parameter from frequent automatic refocusing to interval-based focusing with a preset focus interval. By introducing a time interval constraint and sharpness threshold, the system only triggers focusing when the image site moves outside the focus interval or sharpness degrades significantly, thereby reducing focusing frequency while maintaining image quality.
Solution Approach 2:
The patent implements feedback control by continuously monitoring image sharpness and comparing it against threshold values. The system acquires sharpness statistical values and uses them to determine whether focusing is necessary, creating a closed-loop control mechanism that responds only when actual degradation occurs rather than operating continuously.
2Adaptability or versatility
If focusing is performed whenever the image scene changes, then image adaptability is improved, but unnecessary focusing operations increase wear on UAV components
Solution Approach 1:
The patent introduces a focus interval parameter range [near focus, far focus] and compares the current image site against this interval. Focusing is only triggered when the image site moves outside this interval, transforming the triggering condition from any scene change to a specific parameter boundary condition, thereby eliminating unnecessary focusing operations.
Solution Approach 2:
The patent applies partial action by performing focusing only when necessary (when image site exits the focus interval or sharpness threshold is breached) rather than for every scene change. This selective approach maintains adequate adaptability while avoiding excessive focusing operations that would accelerate component wear.
3Measurement precision
If continuous focusing monitoring is implemented to ensure image clarity, then image quality is maintained, but energy consumption and operational complexity increase
Solution Approach 1:
The patent implements periodic action through interval-based focusing control. Instead of continuous monitoring and adjusting, the system checks focusing conditions at predetermined intervals and only acts when the image site moves outside the focus interval or sharpness degrades beyond the threshold, significantly reducing energy consumption while maintaining image quality.
Data Source
AI summary
The present application discloses a focusing method, a focusing device, and an unmanned aerial vehicle. The focusing method is applied to the unmanned aerial vehicle on which an aerial camera is provided, if the unmanned aerial vehicle is at a high altitude, obtaining an far focus of the aerial camera, and obtaining a preset focus interval according to the far focus, wherein the minimum value of the preset focus interval is less than the far focus and the maximum value of the preset focus interval is greater than or equal to the far focus; and if the current image site of the aerial camera is greater than the maximum value or the current image site is less than the minimum value, then obtaining a first sharpness statistical value at the end of the last focusing, and determining whether to perform focus according to the first sharpness statistical value.